Abstract: Introduced in the article are the manufacture processes with the pilger pipe mill for producing thermal strength steel pipes of grades St 45.8/Ⅲ,13CrMo44,1CrMo910,etc. for hi-pressure boiler and power station services. All the qualified pipes made with the said processes are up to relevant technical requirements as specified in Spec. DIN 17175.79,covering mechanical properties under ambient temperature,mechanical properties under high temperature as well as technological performances.